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Mercy For None: What to Expect from this Gritty K-Drama Thriller Starring So Ji-seob and Huh Joon-ho
Exciting news for K-drama and thriller fans! The highly anticipated series Mercy For None just dropped its intense trailer, unveiling a dark and gripping world where vengeance drives every pulse-pounding moment. With electrifying action and raw emotion, the trailer promises a story that will hook you from the very first scene.
At the heart of this buzzworthy drama is a journey steeped in noir grit and relentless pursuit, perfectly captured in the recently released visuals and teaser. The stark, visceral tone paired with a hauntingly powerful lead performance hints at a story where every choice cuts deep and every secret threatens to unravel. This isn’t just another crime drama — it’s a cinematic adrenaline rush that will keep you on the edge of your seat, craving the next twist.
Ready to dive deeper? We’re breaking down everything currently known about Mercy For None — from cast insights and production updates to the trailer’s hidden clues and what makes this series a must-watch. Stay tuned, because this guide will keep evolving with fresh updates as new details emerge. Don’t blink — the underworld’s secrets are just beginning to surface, and you won’t want to miss a single revelation.
Release date & Where to Watch
The eight-episode series Mercy For None premieres Friday, June 6, 2025, exclusively on Netflix.
What is the plot of Mercy for None?
Nam Gi-jun, once the most feared fighter in Seoul’s criminal underworld, earned his name by leading the Bongsan Gang to dominance through bloody turf wars. But when his younger brother, Nam Gi-seok, rose through the ranks of their rival gang, Joowoon, Gi-jun made a devastating choice—he severed his own Achilles tendon and vanished from the underworld, determined never to raise a weapon against his brother.
Eleven years later, Gi-jun lives quietly, operating a drink distribution business and supplying establishments owned by the very gang he once fought for. That fragile peace shatters when Gi-seok—now Joowoon’s second-in-command—is mysteriously killed just before his planned retirement. Haunted by grief and bound by blood, Gi-jun is pulled back into the violent underworld he once escaped.
With his signature baseball bat in hand and a storm brewing inside him, Gi-jun launches a relentless manhunt to uncover who betrayed his brother—and why. As he navigates a city teeming with old enemies, shifting power plays, and buried secrets, one thing becomes clear: the truth is close, and the path to it will be paved in blood.
In Mercy for None, vengeance isn't just personal—it's inevitable.
Who’s in the cast of Mercy for None?
- So Ji-seob (Doctor Lawyer) as Nam Gi-joon
- Huh Joon-ho as Lee Joo-woon
- Ahn Kil-kang (Queen Seondeok) as Goo Bong-san
- Lee Beom-su (Singles) as Sim Seong-won
- Gong Myoung (Way Back Love, Be Melodramatic) as Joon-mo
- Jo Han-chul as Choi Seong-cheol
- Choi Won-young as Lee Geum-son
- Cha Seung-won (Uprising) as Teacher Kim
- Lee Joon-hyuk (Dark Hole) as Nam Gi-seok
- Ahn Se-ho
- Cho Han-cheul (The Wailing) as Choi Sung-Chul
Is There a Trailer for Mercy for None?
The trailer for Mercy for None offers a gripping glimpse into the dark, revenge-fueled world of Nam Gi-jun. The trailer opens with Gi-jun standing solemnly at his brother's funeral. Armed with his signature baseball bat, Gi-jun is seen confronting former allies and enemies alike.
The trailer showcases intense action sequences, from brutal hand-to-hand combat to high-stakes confrontations, highlighting Gi-jun's unwavering determination to uncover the truth behind his brother's death. Watch the official trailer below.
The teaser for Mercy for None ignites with brooding intensity, plunging viewers into a world where vengeance speaks louder than justice. It opens in haunting silence as Nam Ki-jun stands over his brother’s coffin, grief written across his face. In a voice laced with quiet fury, he says, “Do you remember the promise we made 11 years ago? I kept my word... But the two of you didn’t keep yours.”
That broken promise becomes the fuel for a relentless, blood-soaked return to the underworld he once escaped—by severing his own Achilles tendon. Bloodied and broken but unshaken, Gi-jun declares in a somber voiceover, “I need to end this. All of it,” setting the tone for the dark and desperate journey ahead.
With high-stakes action and emotional depth, Mercy for None teases a tale where every blow lands heavier, and every question cuts deeper. The hunt has begun—and the end will be anything but merciful.
Watch the previously released sneak peek below.
Check out the behind-the-scenes video of the action below:
Is Mercy For None Based on a Manhwa?
While manhwa series are surging in global popularity—fueling hit anime like Solo Leveling and live-action shows like Sweet Home and Itaewon Class—Mercy for None stands slightly apart. Instead of traditional print manhwa, it’s based on a webtoon, a digital comic format designed primarily for mobile reading.
Though webtoons and manhwa share similarities, Mercy for None originates from the web-based Plaza Wars, tailored for online audiences rather than print circulation. So, it’s rooted in the webtoon world, not classic manhwa.
Filming Details
Mercy for None was filmed from Oct. 16, 2023, to April 22, 2024, (via What's On Netflix) with production taking place in various locations across Seoul, South Korea (via IMDb).
Behind the Scenes
Mercy for None (Korean title: Gwangjang) is an upcoming South Korean crime drama adapted from the webtoon Plaza Wars: Mercy for None, created by writer Oh Se-hyung and illustrator Kim Kyun-tae. The series is directed by Choi Sung-eun, with a screenplay by Yoo Ki-sung. Produced by Studio N and Yong Film, this Netflix Original is expected to deliver a gritty, intense take on the underground world of plaza conflicts.
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